Electric metering apparatus.



, F.'W. ROLLER. ELECTRIC METERING APPARATUS.

- APPLICATION TILED JAN. 19,1911. 1,03 59, Patented Sept. 17,1912.

2 SHEETS-SHEET l.

F. W. ROLLER. ELECTRIC METERING APPARATUS. APPLICATION I-ILED JAN.19, 1911-.

2 SHEETBrSHEET 2.

Patented Sept. 17,1912.

useful Improvements in v UNITED STATES PATENT OFFICE.

rnii nxw. Romain, or user ensues, NEW JERSEY.

ELECTRIC mn'rnnme urnnn'rus.

To all whom-it may concern: 7

Be it known th ITFRANK W. ROLLER, a-

citizen. of the United States, residingat- East Orange; in the county of Essex and State of- New Jersey, have invented certain new and Electric Metering Apparatum'of which the following is a full,

clear, and exact specification.

' This invention relates to apparatus for metering electricity,- 1

The main {objectis to provide apparatus of the character described in which a'motor portion comprising a continuously rotating motor is mechanicallyfdissociated from the indicating portion, related try-means of electric circuits whereby the operation of: the motor portion" in' obedience to the current to be measured is accurately indicated by" the indicating mechanism. v a continuously rotating jmotoi ismeant' one in which one directionof rotatiomcontinues for at least one complete revolution and -or-- dinarily does not change except upon'a change in direction of the electricity to be measured. This-dissociation of the indicating and motor portio'ns is of great practical importancein-inany applications; For iiistance, in automobiles the motor part may be located under. the seat or in any com-en. ientplace while the indicating means may be located at a convenient-point for viewing it,-as on the dash-board of, the vehicle.

A further object of the invention is to provide the metering amiaratus with mefchanically dissociated indicating and 1I1 O- liq If the indicating mechanism is sorelated tor parts, so organized that the movement of the indicating mechanism reverses with the reversal of movement of the motor. This feature is of practical importance in various uses as .in systems employing storage bat teries. In such systems a meter may be employedwhich is actuated'by both the charging and discharging currents to and from the battery. The chur ing current being of the revu-se direction rem the dischargingcurren the motor will be rotated in one d1- rectionby the charging current and in the other direction by the discharging current.-

"the motor mechanism that they change (ii rectinn of movement together, the current will show the. difference between the mnount of current which has beenf cha'rged into the battery ,and a which has 'been discharged therefrom. By suitably arranging and conthe two iportions being a It is to be understood/that by a hereinafter, 5

, the operating ated by the electricity I rises-a receptacle 1 constructed of sliitable" --at diametrically opposite to v having H disk 5 iscreated by thepermanent horseshne Specification of was 1 mm i Patented Sept. 1'7, 1912. i A plicationmed Januar 19,191 1r Seriatmi, 603,484.: i

structiiig the indicatingfmechanis'm the condition of cha'rgeof the battery maybe ob served. As is'well known, the efficiency of the battery is not one hundred percent. and therefore a less amount of current can be ob-' tained frtamthe battery than "that which has of the battery will become exhausted upon the withdrawal of -aless amount of current from git-than that, which has been charged intoit. In order, therefore,that the indi x" eating apparatus necessary tobe viewed in )7 order to. ascertain the condition of' the charge. in the batteryymay be simplified the indicating mechanism is madetooperate ata less ra-tegon harging than on discharging.

' It-is, therefore, a'further object-of theinbeen put into it. Accordingly, theicharge vention to provide'nieansin metering apparatus in which the motor portion and'the in; (heating portion are '1 dissociated, as tie-- scribed; in which the indicating mechanism shall operate at a less rate when thcmot-or turns in one 'directionfrom that at which it operates when the motor is turning in the other direction.

Otherobjects ofthe invention will appear l In the rac'companying drawings which illustrate the invention Figure 1 -18 a di a-: grammatic view'of apparatus embodying the invention; Fig.2 is a section on line 2- 2 ofi- Fig.- 1; Fig. 3 is a i'iew similar to Fig.1

butiin a'ditlcren-t position: Fig. 4 is a par- I t-ial-section on the line 4-4 of Fig. 2, showing the uiunner of mountingthe contact pins; Fig. 5" shows a modification 0t thcinwhichdifference of rate of operation isvobtamed by difference m length'of stroke of pawls;:-Fig. (i is a diagram tlicuting mehanism actuating means in,

showing a' modified form of contacting dc- V vice 7 Referring to the drawings and first to Figs. 1, 2, 3and=4, the motor which is ag'tuto be measured conitricalcontitcts 3 and 4:; VB'ctiveenthewontacts 3 and 4 ismounted the disk- 5 f-suit pointsythe elec v able conducting material, such as copper;-

this disk being fixed upon is rotatablysuppor d.

its lines'oi force transverse tox'tlie magnet 7, the magnetic cicuit {which is the shaft 'Gwhich-f A magnetic field I I through the ihag'Deticarhiature 3. 'Iherubbn butinsulated shaft 1;

. the contact of a douhlepoledouble th1QW:

' the meter motor which will-rotate cont-inn;

contacts 20'and 21 of the double pole double now the double casing is fixed u on the shaft .22 and has .contactrpins are? 7 pins 33;hzid 35 are 'co'nn ceptacle 1 contains mercury 2 which sub-- merges the contacts 3 andg4- and;disk;5, Qner terminal 4 of the meter motor is connected to one terminal of-the storage battery-9, 1 while the other is connected. with switch asshown; The other terminalof the battery is connected to thecontact 11 the switchtreferred to. 12 represents a as iori-nstance ofan automobile,vv having its-terminals connected to the 'con'-' tacts 13 and 14 of the switch referred to. A chargi generator *15 has its res 'ective terminiifi, connected-to flexible con uctors provided-with the contacting plugs 16 and 17 which are adapted-tobe nserted in the contact sockets 18- and 19. These sockets are-=. electrically connected with the switch throw switch. It'will nowbe apparent that when the double pole; double-throw switch is thrown downwardly so as to connect the motor 12 with the storage battery, currentwill flow from-the stora battery through the motorl2 to propel e latter, and that the propulsion current flow through ously' in one; direction. at a velocity according to the currentflowin through;it.. If oledou 1e throw switch.- be thrown-.upwar 1y .sothatthe battery cira cuit is connected with. the, contact sockets '18 and, 19 ,and thep1ugs'. 1 6 and 17 a are inserted" in the: sockets, the charging generator 15' will be. connected in series with the storage battery and current will flow throught e same to charge the Battery. This charging current-will flow in the oppositedirection from: that of the discharging current employed to operate the motor 12 as before re ferred' to, and therefore the meter motor will rotate continuously in theEo posite direction.' Themeter' motorf'sha 6 drives the shaft 22 -throu h worm, 'or other suitable, gearing 23. oun'ted upon the shaft 22 is a contactmakin and breaking devicewhichfcomp'rises a ho owcasing formed of the two halves 24 and 25 secured together by any suitable means such asbolts 26'. This the central cham r .27- from, which extend the curved channels 28, 29, 30 and 81, each of which channelssterminates in a circular chamber as 32, *In these four circular charm bers at'lth'e extremities of the-curved chari- 'liitedfromfthcis Dia'gcaanjicppsm as ther,%thzit is, c I *togetheriand pins 36 areiconnecte'datcgethe'r "the pins 34 spa se; are connected-with; a lip rliln 37 fi ine'dupion but insulatedfrom'th'e S 8 rachedfwhenha '22-, jwhilethe pins 33 and .35 are con-f;

nected with the slip ring :38 'which --is also Also fixed upon the shaft 22 and in electrical connection therewith, so that it is electrically connected with the casing formed k-of the-parts24 and-25, is the slip ring 39.

Within the casing formed of the parts 2 1 'i'eferred to, serves to bridge the -insulation as 41, which insulation serves to electrically the casing rotates with the shaft 22 the globule shifts its contact from one pinto 'another thereby making and breaking the 1 circuit at the different pins. insulating an'd .-25 is z rglobule'v 40 of mercury which,;- n when in contact with one of the contact pins separate the pin from the casing,--the globule Z5 'thereby servm -to connect the pin with the casing. It wil further be observed that as section 84 is inserted in the shaft-22 to electrically separate the motor from the conf tacting device. In order that; the operation inst. referred to may rstood,

Fig. 2 and prior to the position shown in Fig. 2,. the mercury globule is in the circular .chamber containing thep ll 33. U t-o this I of the contact makingmand brl'eakinfdevice 5?- clear y un .e

' etitbe assumed that the device is rotating --in' the direction of the arrowa as shown in pgsition as shown in Fig. '2'the glo ule' has I en in close contact with the pin 33, electrically connecting it. with the casing QIn and enter the circular chamber at. the end the position shown in,-Fig. 2, however, the V globule' will quickly ,leave the: pin 33 .-and, 1, traversing the channel28 willpursue the path asindicated by the arrow 72. across the chamber 27, will traverse the channel 30,

of that channel which contains the pin 35, and will connect that pin with the casin r The globule will remain thus in contact wit the pin 35 arid the casing until," in the revo-r lution of the device, the globule will leave the pin 35 and, traverslngthekchannels 30 I and 28'will again come in co tact with'the pin 33 and connect it witht e casing. f It will; thus beapparent thatso long as the direction of rotation of'the device continues to be that indicated by the arrow a in Fig.

2, that the pins 33 and 35 will be alternately" connected and disconnected with the casing. 7

If, ,however, the direction of-rotation changes-to that indicatedby the arrow in Fig. 3, the conditionsywill be such that the pins 34 and 36 will be alternately connected and disconnected with the casing. [Thus if we consider the contacting device in the is e:-

position-as'shown in Fig.2 and the mercury 105 1 t-w wiw e. Pi i v i rotation of the. device fkesj'place in gthe;

inFi 3. the;

globule will leave the channel 30 and, taking a ath through the central chamber 27 as in icated by the arrow in Fi 3, it will traverse the channel 29 and estab 'sh contact with the the device continues in the direction of the arrow afm Fi 3' the globule will alternately make an break contact with the pins 34 and'36 in a manner similar to that described in connection with the pins 33 and 3.5.- ,The indicating mechanism comprises two stationary coils 42 and 43 each having a terminal connected to the common wire 44 in the electric cable which connects the in- 'di'catin ratus rom which it is, mechanically mechanism with the motor appadissociated; The other terminals of the coils spectively 42 and 43 are. respectively connected to the wires 45 and 46 ofthis cable. Te wire 44 leads through a battery 47 to the r h-I48 bearing upon the s1ip-ring'39. while the conductors 45 and 46 are respectively con neeted'to the brushes 49 and .50 which reear upon the collector rings 37 and 38. ,The coil 42 has a magnetic armature 51 fixed to an arm 52 pivoted at 53 to a stationary portion of the apparatus; To the tail of the arm 52 is secured one end of a spring 54, ing secured at 55 to a stationar part of the apmratus. This spring ten s to pull downt etail end of the arm 52 and to clegvate the portion of the arm on the other side of its pivot from the spring.- The upward movement ofthe arm under tin. influence of the spring 54 is limited by an adjustable 56 screw threaded in a st-aticnarypor- Pivoted at '57 'upon the garm 52"is a pawl 58 having its nose 59 pressed toward the ratchetteeth 60 of the ratchet wheel by a spring 61. The coil 43 stop tiortcf the apparatus.

has a magnetic armature 62 fixed to the arm 63 pivoted at 64 to a stationary part, the por- ,tion of the arm at the left hand of the pivot 64 tending to be raised by the sprin 65 which extends between the tail end o the arm 63 and a stationary part 66. The upa ward movement of the arm 63 islimited by the adjustable stop 67 which is shown as a screw threaded into a stationary part. .At 68 a .pawl 69 is pivoted to the arm 63, this ,pawl having its n'ose 70 ressed toward the ratchetteeth of a wheel 1 by a spring72. The 'tip 73 of the arm 52 engages the lug 74 on the pawl 69 so that when this tip moves downwardly the nose 70 of the pawl will be forced out of engagement with the ratchet teeth 71. Similarly the tip 7 5 of the if arm 63 engages with a lug 76 upon the awl 58 'sothat the nose 59 is moved out 0' en gagein'ent with the ratchet teeth ,60 when the tip is moved downwardly. The

ralichet'wvheels respectively carrying the teeth 60.5116. 71 are ofdifferent diameters as shown and are fixed side by side upon a rolat-ably mounted shaft 7;

pin 34. Then as the'rotation of energized the other [end of said spring be- .upon the shaft 77 is a small pinion 78 which engages with the rotatably mounted pinion 79 of a much largersize-than the pinion 78 vso-that a given angular movement. of the a pinion 78 produces a fvery much smaller angular movement inthe pinion 79. Fixed to the pinion 79 is apointer 80 passing over asuitably calibrated scale 8 1. It now be ing assumed that the adjusting screws 56 and 67 are adjusted tov give equal strokes of the pawls 58 and 69, if" the magnet 43.be it will attract its armature 62, drawing the same down against the'tension of thespring 65, thereby 78 and 79 and causing the pointer 80 to move over the scale 81. Uipon deenergizat-ion of the coil 43, the pawl 69 will be retracted to be in a position to againmake a forward stroke resulting in movement of the pointer over the scale as just-described. The movement of the-pointer over the scale, therefore, will depend upon the rapidity with which thecoil .43 is energized and deenergized.

Similarly the pawl 58 will be oscillated according to the energi'zation and deenergization of the coil 42. As this pawl 58 is oscilp I causing a forward stroke of the pawl 69 and advancingtle a ratchet teeth forward, turning the plnlons' hated it will turn the ratchet wheel'carrying the teeth 60 step by step and, since the ratchet teeth 60 are oppositely directed to the teeth 71, the shaft 77 and the pointer 80 will be turned in OPPOSltGdlIQ-OUOIIS when actuated by the pawl .58 from the directions in which'they move when actuated by the pawl 69. It will further be observed that the diameter of the wheel carrying theratchet teeth 60 is of larger diameter than the wheel carrying the ratchet teeth 71 and 1 tively into engagement with'the contacts '20 It will, of course, be understood and 21,.

that these switch blades are insulated from each other. Also assume that the plugs '16 and 17 are inserted in the sockets 18 and 19. Circuit'is now completed through the charging generator 15, the storage battery 9, and the meter, the circuit through the meter being made through the stationary contacts 3 and 4, the armature 5 and the mercury iny which the said contacts and armature'are immersed. The charging current will then flow from the charging gene rator 15 through the storage battery 9. This 9 current will: be ina certain direction and will cause the rotation of thearmature 5.,

in a certain direction, vihiuhidtatiortwill by the arrow (1 in Fig. 3, the mercury globcontinue" as long as the direction of the current is unchanged. This direction oi rotation of the meter will produce a direction of rotation ofthe contact making and breaking device carried by the shaft 22 as indicated ule 40 making andbreaking contact at the pins 34 and 36 alternately. When the globule in contact with either of these pins, circuit will be completed from one terminal of the coil 42, through the conductor 45 brush 49, slipring. 37, one of the pins 34 01 36, the mercury 'globule'40, the casing of the make and break device, shaft 22, slipring 39, brush 48, battery 47, and'conductor 44 tothe. other terminal of the coil 42. With the circuit thus made the'coil 42 'is energized, drawing down the arm 52 against the tension of the spring 54 .and causing a forward stroke of the pawl 58. When, however,the globule 40 is outof contact with either of, the pins, the circuit of the coil 42 .is broken,'t-he arm52 is retracted by the vice upon the s'haft22 which'in turn :is dependent upon the speed of'the shaft 6 spring54 and the pawl 58 makes its return stroke. It will be apparent that the number of-strokes of the pawl, and therefore the speed with which the pointer 80 moves over the dial \81will depend upon the frequency of energization and denergization of thecoil 42. ,-This is in turn dependent u on the speed of rotation of the make and break dedriven by the armature 5 and, as is well known, thespee'd of the Iarma'ture' 5 de: pends upon the amount of current flowing throu h it. If itbe desired to operate the motor 12 by current discharged from the battery 9, the switch pivoted to the contacts 10 and 11 is thrown downwardly so that its blades engage respectively with the contacts 13 and 14 when circuit will be completed throur h the storage batterv 9, the armature 5 of the meter and the motor 12. Thecurrent now being discharged by the battery is in the opposite direction from thecharging 1 current which was supplied by the charging generator 15 and therefore the armature 5 of the meter motorwill rotate in the opposite direction at a speed proportional to the 'amount of current flowing through it. The make and break device upon the shaft 22 will'therefore have its direction of rotation reversed sothat it will rotate in the directionof the arrow a' in Fig. 2. Circuit will then be alternately made and broken at the pins 33 and 35 as has been described. .When the globule isdn contact with one 01' the pinscircuit can be traced one terminal 26f :the coil Q43' thmugh .the con ldl luntor '46, brush; 50,- slip-ring 38, one of 118-33 0135,: the casing of the make and Brit .device, shaft 22, slip-ring a9, brush 48,-bfltfl'11 47, and conductor 44 to the other tennihnl-i ottheia coil 43. With. the circuit.

thus made the coil 43will be energized'and tract the arm '63 and its pawl. It will be device upon the shaft 22 which'in turn. is

dependentupon the speed of the armature 5, It will be observed that while'the battery 9 is being charged, the pointer will be moved toward the right over the'dial 81 at a certain speed for a given flow of charging currentwhile the pointer is moved in the opposite direction'over the dial ata different rate when the battery is discharging current. By suitably relating the sizes of the v ratchet wheels of the indicating mechanism, the difi'erencein rate ofindicating charging..

and discharging currents can be made such, I that thediscrepancy between the amount of current which can be obtained fromthe battery and that which must be charged into it to secure that amount-of discharge, will be compensated for and theindicator will show-the true condition of-charge oftheffl5 battery. 7

In Fig. 5 is shown a modification,

indicating mechanism inFigt 1, in which,

instead of depending upon. di-Herentgsized ratchet wheels for-producing diii'erent rates.. of 1nd1cat1on,as is done in-Fig. l, two ratchetwheels 82 and 83 of the same size are em-fi'.

ployed and the difierent rates are secured by adjusting the pawls 58 and 69 to difl'erent 10 lengths of stroke to ,accom lishlhe desired difference in rate. This di erence in length of stroke may be secured by suitablyads;

justing the screws 56 and-67, Except fQl'lZl'IG 2 difference noted, the mechanism of Fig.5 2 1s exactlythe sameas the-indicating n cclra v Trio f nismof Fig 1 and operates in the same way. 5

The ratchet wheels of the indicating mechanism in both Figs. 1 and-5 are provided with v v I I fine teeth 50 that ,one stroke of apawl willfcarry it overseveral teeth and the-movement,

of the wheel at a stroke canbe adjusted by:

varying the number of teeth covered by 1:

stroke of the pawl. 7

Referring to Fig. 6 of the drawings, the] indicatin mechanism, which may be; the; t in Fig. l and is so shown, co1n-:. prises the coils 42am 43 fromciwhiich the flexible cable including the wires 44 I45Iand 46 extend as '"inFig. Also, as in ltig.v 1, 3

same ast there are the charglng generaton15 with its plugandsocket contacts 16,17, 18 and 19, V

the motor 12, the. storage ,batteryftl, the

double throw switch ha ing-contacts 10, 11, 1

13, 14, 20and 21, the battery 47 for energiz}, i I ing the magnets 42 and43 and the meter l different construction from t at shown inforced at its end by V 1 form, adjustable contact 7 from the-contact s remain for accrta-in.

- 7 and contacts 3 and 4 .andthe armatux-e5, the shaft 22- being driven through worm-gear1ng23. This shaft 22, drives a' contact making and breakin device of a ig. 1-, which may be insulated from the mo- 3 tor by an insulated section in the shaft as ,in Fig. 1. ,Alsoin Fig. 6, contacts 85, 86-

'm-and 87 and a blade for enga ement therewith areaddedto. the switch or connecting .the storage battery with the chargingge 'erator or the driven motoras may be de--.

sired. I It will, of course, be understood that in the apparatusof Fig. 6, as in the apparatus of 1, the switch blades are insulated from eac other and each is. pivoted to a central contact. 1

The contact making and breaking device of Fig. 6 comprises an eccentric or cam 91 fi'xed upon the shaft 22 and located between the tines of a fork 92, which is pivoted at 93, so that the fork 92 moves up and downv in an voscillatingmovement about the pivot 93. as the shaft 22 rotates. Secured to the fork 92 and extending to the right of the [pivot 93 is a steel spr ng 94 preferably re contact pieces 95, al-

though such" contact pieces may be omitted and contact-madev directly with the spring 94. The spring extends between the poles vofaa @permanent magnet 88 of .horseshoc.

screws 89 and fibeing.-.-provid,d in the extremities of the magnet. Electricalconnection is; formed "through the magnet 88 by-means .oF'a conductor 44.- Also it will be observed that-one v terminal of the battery 47 is'connectedwith the spring 94; The spring 94 being in the mid -position, as shown in Fig. 6, rotation of the cam'91 will 0 crate to bring the spring 94 closer to one o he. contacts 890i '90, say 89, and when the spring .has been moved close enough to the pole of the magnet 88' which carries this contact, the magnetismwill overcome the tensionof the spring .94 and quickly draw the-spring into engagementwith the contact 89 so that electrical 1 connection will beestablishedfrom the-battcry 47 to the-conductor. 44. "As the rotation of the .cam 91. continues, the spring 94* "will tend to move away from the'icjontact 89 andthe. spring 94 will be tensed until such a ointis reached that the magnetism-is no onger of suificient strength to held ,the spring against the contact 89, when the spring will quickly fly away from its sta tionary co'riperat-ing. contact and'the circuit between the spring and the magnet will be, broken: The dimensions ofthe apparatus. are such that, when the spring 94 flies away... 9g; ni-ilLnetapproah so near to themppfidte contact- 90. as to be at flficcdiawn into'contact therewith, but will which it will overcome yet the battery with either of the contacts 89 or 90. As' the cam 91 rotates still further the spring 94 will be caused to approach closer to the contact 90 until, when a-certain point is reached, the ma etism' of that pole will draw the spring into engagement with the screw 90 when circuit will again be established. As the rotation of the cam progresses the spring 94 will be tensed until it reaches a point at the magnetic attrac- 'tion and the spring 94 will fly quickly away from the contact screw the cam 91 rotates, the spring 94 will be brought alternately into engagement with the contact screws 89 and 90. Let it now be assumed that it be desired to charge the'battery.9 from the'generator -15. The switch will accordingly be thrown upwardly so as to connect thecontacts 10 and 20 together, the contacts 11 and 21 together, and the contacts 85 and 86" together. Circnit' may then be traced through the generator. 15, contacts 90.. In this way, as

3 and 4, armature 5, the meter and the store age battery 9. The armature 5 will, therefore, rotate in a given direction with a speed roportional to the charging current owlng through it. It will be apparent that the cam 91 will rotate and the spring 94 will make and break the circuit through the. wire 44 with a frequency proportional to the speed of the armature 5, i. e., to the amount of current passingthrough the armature. When the circuit is completed through the spring'94 and either of the contacts 89 or 90,,zcircuit may through the magnet 88, the conductor 44, the magnet 42, the conductor 45, and switch 0on tacts 86"and 85, to the other terminal of the battery 47. It is apparent, therefore, that as the circuit is made and broken by the 'spring 94 that the pointerfwill be moved over the scale by reason of -the..energiz1ng ,and deenergizing 'S Ul'ibe d in connection, with the indicating 1, and that this energizmechanism of Fig.

of a frequency deing and de'elnergi'zing is pendent 'upon thefrequency of the making and breaking of the connection by the spring 94, which is proportional to the current flow .ing' through the..meter motor armature as "has been pointed out. Should it now be dethe motor 12. by current discharged through it by the storage battery 9, the triple pole double'throw switch will be throwndownwardly, thereby connecting the --switch contacts 10 and 13, connecting the sired to operate be traced from one terminal- 47 through the spring 94,

of the 'magnet 42, as deswitch'contacts 11 and 14 and connecting the contacts 85 and 87.- ircuit may then be traced {throng}; the storage battery 9, the mo- --ter'12, arrd meter: armature 5,;when this armature will rotate'in the opposite direction from that just considered and at a. speed proportional to the diSCllu ge current passperiod out of contact ing' through it- In a similar manner to that V to I described in connection with the opposite g 44, magnet 43, conductor 46, switch contacts r 87 and 85 to the other terminal of the bat-.

site to that in'which it was turned by the acare merely illustrative and the invention declare thatwhatlclaim'as new and.des 1re .said motor element and electrical means for- I controlling said mechanism accordin to the a c means comprisin I from said motor e ement to said indicating mechanism and means for 'rever'sing the indicating mechanism when the rotation of the 'niotor'is reversed. i

. --2. In an electricmetering apparatus, the

ing a continuously rotating motor actuated ii 'r tatiofi jr".t1imomr isreversed" ."e mbig ti in with; m i mating" "element comprrs'ing ap indicatorand mechanism foroperatingsald indicator in both directions,

but at a different rate in one direction-from chanically dissociated front;

direction of rotation pure meter, the cir'-' cuit of the, battery-47 willv be alternately made and brokenat the. contacts 89 and 90. With the switch. shown as described, however, the circuit of thisbattery will not pass. through the magnet 42 as previously, but will now pass through the magnet143- bya circuit which may be traced from one ter-, minal of the battery 47 through the spring 94, one'of the contacts 89 or 90, conductor tery 47. Themagnet 43 will, therefore, be energized and deenergized as the circuit is made and broken by the movement of the 94 and these energizations and deenerglzations of the magnet 43 will operate as explained in connection with the indicating mechanism, in Fig. '1 to turn, the pointer over the dial in the direction oppotion of the magnet .42. H

. While the invention has been illustrated in' what is considered its best applications it is to be understood that the forms shown is. therefore not limited to the structures shown in the drawings.

.' Having thus described my invention I 1. In an electric metering apparatus, the combination with a motor element comprisinga continuously rotating motor actuated by. the cu'rrent to be measured, indicating mechanism mechanically dissociated from controlling said mechanism accordin to the operation of said motor, said e ectrical conductors extending combination with a motor element comprisby the current to be measured indicating mechanism mechanically dissociated from said motor element andelectrical means for operation of said motor, "said--e ectrical means ,COIIIPIISJII ersing jthe d1c'ating' mechan" when the I Ijfan'electricmeterin' apparatus, the

that in the other, ofa motor lenient mesaid contactin toward'and away from the aforesaid d indicat-ing element,- comprisinga nietbrfadaist'ea to be actuated by current to'be measured and electricalmeans for controlling the operation of said mechanism in both directions of movem'ent of the indicator according-to the opera'tion'. of said motor, electrical means erating the same, of a motor' element me:

chanica'lly' dissociated from "said indicating element, com 'rising'a motoradapted to be actuated by t e current to be measured and a contacting device driven by said motor, and electrical conductors 'extendin from device-to. the in eating mechanism, sai contacting-device comprising a contact and a second contact mdvable contact to make and break the; circuit therethrough' and means foricausing said second contact to move -away from the other contact at agreater speed'than it isdriven by said motor. H

5. In an electric metering apparatus, the

combination with an indicating element, of a "motor element mechanicallyrdissociated therefrom;- said-motor element jcompri'sing a motor adapted *to' be actuated by the current to be measured andla contacting device actuated by said motor, and-conductors extending from said contacting. device to said indicating elementf said contacting device comprising means or producing a magnetic pole, an elastically mounted contacting mem- 'br'fadapted' to be -moved ir'ito tnd out of the attractive influence offs'ai'dJpole and means whereby said contact; member is drivenby said motor;

6. In an electricmetering ap' aratus, the combination with an indicating e ement comprising an indicator and mechanism for opcrating the same,- of a motora'element mechanically dissociated therefrom; said indicating element comprising a motor. adapted to be actuated by the current. to be measured and a contacting device driven bysaid motor, and electrical conductors. extending from said contacting device to the indicating mechanismgf'said contacting device comprising a contact" and "a second-contact movz conductors" extending -a d; ifibm s id motor "e ement to said indicating Q means for automatically I re-;

way fron'ii-tlieisaforesaid d break theFl ircuiti therethroiigh ind uneans for: storing ,{energy and liberating the same"..at-.theitime@said contacts sparated torincrease the'spmi'of movemenace-one contactz away fromwthe other fl'overthat at which itis :driven-bylsaid motor.

mechanism fordriving saidindicator, electriccoils for operating said mechanism to move said indicator in different directions respectively of amotor element mechanically dissociated from said indicating element, comprising a motor adaptedto be actuated by current to be measured, a contacting device driven by said motor and controlling the circuits of said electric coils, and electrical conductors extending from said contacting device to said coils.

S. In an electric metering apparatus, the combination with an indicating element comprising an indicator, pawl and ratchet mechanism for driving the same, and two electric coils adapted to operate said mechanism to drive said'indicator in opposite directions respectively, the said indicator being driven by one coil at a different rate from that which it is driven by the other,

-- the said two electric coils respectively according to the direction of rotation of said mdtor.

In testimony whereof I afiix my signatur in presence of two Witnesses.

FRANK W. ROLLER.

Witnesses THOMAS Hows, WM. G. \VALKER.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

